Gigahertz Secure E-Mail Policy

In order to ensure hassle-free e-mail communication with Gigahertz, please read the following information.

I want to exchange secure e-mails with Gigahertz

Gigahertz encrypts all e-mails if a valid public key can be found for the recipient.

Gigahertz employees are instructed not to accept any enrollments on third-party systems with a password, as our keys are accessible at all times for gateways and also manually.

Encrypting with S/MIME or OpenPGP

You can find our employee certificates in the Z1 Global TrustPoint.
So that we can encrypt to you, please publish your certificates in the Z1 Global TrustPoint or send us a signed e-mail with a certificate attached.
Certificates from unknown CAs and trust centers are not recognized as valid. Please contact us so that we can add the CA concerned if necessary.

How do I know that the e-mail I received is really from Gigahertz?

Gigahertz sends e-mails from the domain gigahertz.de.

All e-mails that we send are signed and use DKIM, SPF and DMARC.

I would like to send Gigahertz a file or large amounts of data

We reject emails larger than 30 MB. For the secure transfer of large files, ask your Gigahertz contact for an upload link to a secure cloud drive.
Do not send us any executable files, scripts or macros. Attachments that may contain potentially harmful programs (viruses etc.) will be rejected.
Microsoft Office files with macros are rejected. Here you can read how to remove macros from documents.
Convert your documents into PDF or CSV files before sending them.
ZIP and PDF files with attachments will only be sent if the files they contain also comply with our e-mail policy.